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Meaning of protactinium
1 definition found
From WordNet (r) 3.0 (2006) [wn]:
protactinium
n 1: a short-lived radioactive metallic element formed from
uranium and disintegrating into actinium and then into lead
[syn: {protactinium}, {protoactinium}, {Pa}, {atomic number
91}]
WordNet ® Princeton University. http://wordnet.princeton.edu
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